<template>
<div :class="['big','red']">
  张三
</div>
</template>

<script lang="ts" setup>
import {ref, watch} from "vue";


</script>


<style>

  .big {
    font-size: 20px;
  }
  .red {
    color: red;
  }
  .small {
    font-size: 10px;
  }
</style>